Headboard for a bed



FIG. 1 is a front elevational view of a headboard for a bed, embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof; and

FIG. 4 is a top front and right side perspective view thereof. 

The ornamental design for a headboard for a bed, as shown and described. 